Granulomatous enteritis in rainbow trout (Oncorhynchus mykiss) associated with soya bean meal regardless of water dissolved oxygen level
This study investigated morphological changes associated with soya bean meal‐induced enteritis (SBMIE) in distal intestine (DI) of rainbow trout (Oncorhynchus mykiss) fed a soya bean meal (SBM)‐based diet and exposed to normoxia or hypoxia created by optimal and low water flow rates, respectively. A 28‐day adaption period was followed by a 42‐day challenge period where 600 fish were subjected to dietary challenge and/or hypoxia. Twelve tanks each containing 50 juvenile trout were assigned randomly in triplicate to each treatment. Histopathological and immunohistochemical evaluation revealed pathological features th...
Source: Journal of Fish Diseases - September 25, 2017 Category: Zoology Authors: P Mosberian ‐Tanha, T Landsverk, C M Press, L T Mydland, J W Schrama, M Øverland Tags: ORIGINAL ARTICLE Source Type: research
Effect of repeated exposure to AQUI ‐S® on the viability and growth of Neoparamoeba perurans
This study contributes to assessing the feasibility of using such approaches to study amoebic gill disease (AGD). Neoparamoeba perurans, agent of AGD, has been responsible for widespread economic and fish loss in salmonid aquaculture. With the emergence of AGD in Europe, research into infection dynamics and host response has increased. This study investigated the effect of repeat exposure to anaesthesia, a necessary requirement when following disease progression in individual fish, on N. perurans. In vitro cultures of N. perurans were exposed every 4 days over a 28‐day period to AQUI‐S® (isoeugenol), a popular anae...
Source: Journal of Fish Diseases - September 25, 2017 Category: Zoology Authors: R J Chance, Z Allcock, C J Secombes, B Collet, C Collins Tags: ORIGINAL ARTICLE Source Type: research
Candidatus Actinochlamydia pangasiae sp. nov. (Chlamydiales, Actinochlamydiaceae), a bacterium associated with epitheliocystis in Pangasianodon hypophthalmus
Abstract
Chlamydial infections are recognised as causative agent of epitheliocystis, reported from over 90 fish species. In the present study, the farmed striped catfish Pangasianodon hypophthalmus (14–15 cm, 70–90 g) with a history of cumulative mortality of about 23% during June and July 2015, were brought to the laboratory. The histopathological examination of gills from the affected fish revealed presence of granular basophilic intracellular inclusions, mostly at the base of the interlamellar region and in gill filaments. A concurrent infection with Trichodina spp., Ichthyobodo spp. and Dactylogyrus spp. was obse...
Source: Journal of Fish Diseases - September 22, 2017 Category: Zoology Authors: N Sood, P K Pradhan, D K Verma, M K Yadav, Ravindra, A K Dev, T R Swaminathan, N K Sood Tags: ORIGINAL ARTICLE Source Type: research
Production ‐level risk factors for syncytial hepatitis in farmed tilapia (Oreochromis niloticus L)
This study aimed to establish the production‐level risk factors associated with presence and severity of SHT. Production factors were analysed during multiple outbreaks of SHT that occurred between 2011 and 2013 on a single tilapia farm in Ecuador and compared with the year 2010 before the SHT outbreaks. Relative risks, t tests, modified Poisson and forward stepwise linear regression analyses were performed using EPIINFO™. Compared to other strains, Chitralada had an elevated risk of SHT [RR = 2.1 (95%CI 1.8–2.4)]. Excessive mortality associated with the presence (and severity) of SHT increased by 611 (365), 6,814 ...
Source: Journal of Fish Diseases - September 18, 2017 Category: Zoology Authors: R M Kabuusu, A T Aire, D F Stroup, C N L Macpherson, H W Ferguson Tags: ORIGINAL ARTICLE Source Type: research
Response of Caligus rogercresseyi (Boxshall & Bravo, 2000) to treatment with Hydrogen Peroxide: Recovery of parasites, fish infestation and egg viability under experimental conditions
Journal of Fish Diseases, EarlyView. (Source: Journal of Fish Diseases)
Source: Journal of Fish Diseases - September 17, 2017 Category: Zoology Source Type: research
